This Bluetooth earphone is adopt TWS true wireless technology, which gives you an unexpected comfortable HiFi music enjoyment without messy wire. Light and elegant design, built-in high quality speakers and microphone allow you to answer phone call, listen to music while walking, running, climbing, driving, etc. Order and enjoy it!   Features TWS true wireless in-ear Design: Light and portable in-ear earbud for comfortable wearing experience, wireless and stable for wearing, suitable for working, business, driving, walking, running, cycling, and other indoor and outdoor activities. High Fidelity Audio Output: High definition vibrating diaphragm speakers allows HiFi audio effect and keeps bass more surging, bring unexpected smooth and clear music to your ears. Bluetooth 4.1 Connection: ensures stable signal transmission and powerful compatibility, easy to connect to your devices in seconds, widely suitable for most Android/ iOS/ Windows/ Symbian OS phones. Bluetooth Hands-free Dial: Support hands-free call, relieve your hands free. Built-in high sensitivity microphone with digital signal processing noise canceling technology, provides you a loud sound quality and clear communication effect. Listen Longer: Built-in 55mAh rechargeable lithium battery enhances super endurance, allows up to 3 hours for playing music or 2 hours for talking. SpecificationsColor: Black, White (Optional) Type: TWS In-Ear Ear Hook Type Bluetooth Version: V4.1 Transmission Distance: 10m / 33ft Frequency Range: 2.4GHz ~ 2.48GHz Battery: Built-in 55mAh Rechargeable Polymer Li-ion Battery Charging Time: Approx. 1 ~ 2h Talking Time: Approx. 2h Playing Time: Approx. 3h (Actually depends on playing volume.) Standby Time: Approx. 30h Package Size: Approx. 96 * 74 * 36mm/ 3.8 * 2.9 * 1.4in Package Weight: 30g   Package List1 * Ear Hook Earphone 1 * USB Charging Cable 1 * Ear Hook 1 * User Manual